The Rheem-Ruud 43-101666-68 is a round run capacitor rated at 45 MFD and 440V, designed to support reliable motor operation in HVAC systems. It stores and releases electrical energy to provide the necessary phase shift for starting and maintaining consistent motor operation. This capacitor helps improve motor efficiency, maintain stable performance, and support dependable operation. https://www.partshnc.com/43-101666-68-rheem-ruud-440v-45mfd-round-capacitor